B.Sc. (Chemistry, Honours) from Scottish Church College, University of Calcutta in 2008.

M.Sc. ( Physical Chemistry special) from Presidency College, University of Calcutta in 2010.

Ph.D. from University of Calcutta in 2016.

DTC Southern Heights, Block 6, Flat No. 7C

D.H. Road, Joka, Kolkata -700104

Physical Chemistry

• Photophysical study (e.g. Excited State Intramolecular Proton Transfer (ESIPT))of various biologically important molecules, their interactions with various biological, biomimicking and supramolecular assemblies to extract novel insights into the fundamental mechanism of interaction.
• Synthesis of nanoparticles (specially gold nanoparticles (GNP)) by varying surface modification and their applications.

Spectroscopy and Nanomaterials

• D. Ray, A. Bhattacharyya, S. C. Bhattacharya, N. Guchhait, Modulation of ESPT Dynamics in a Model Lactim-Lactam Tautomeric System by Anisotropic Gold Nanoparticles, J. Phys. Chem. C, 122 (2018) 17544-17551
• D. Ray, A. Pramanik, N. Guchhait, Modulation of Excited State Proton Transfer Dynamics of a Lactim- Lactam Tautomeric System in Different Block Copolymer-Surfactant Aggregates, J. Phys. Chem. B 119 (2015)10114−10123.
• D. Ray, A. Pramanik, N. Guchhait, Slow proton transfer dynamics of a four member intramolecular hydrogen bonded isoindole fused imidazole system: A spectroscopic approach to photophysical properties, J. Photochem. Photobiol. Chem. A, 302 (2015) 42-50. 

• D. Ray, A. Kundu, A. Pramanik, N. Guchhait, Exploring the Interaction of a Micelle Entrapped Biologically Important Proton Transfer Probe with the Model Transport Protein Bovine Serum Albumin, J. Phys. Chem. B 119 (2015) 2168–2179. 

• D. Ray, A. Pramanik, N. Guchhait, Differential modulation of lactim–lactam tautomerism process of an isoindole fused imidazole system in three different micellar assemblies of varying surface charge: a spectroscopic approach to various photophysical properties, RSC Adv. 4 (2014)13256-13265.
• D. Ray, A. Pramanik, N. Guchhait, Lactim–lactam tautomerism through four memberhydrogen bonded network in isoindole fused imidazole system: A combined spectroscopic andtheoretical approach to photophysical properties, J. Photochem. Photobiol. A, 274 (2014) 33-42.
• A. Samanta, S. Jana, D. Ray, N. Guchhait, Modulated photophysics of a cationic DNA staining dye inside protein bovine serum albumin: Study of binding interaction and structuralchanges of protein, SpectroChim. Acta Part A 121 (2014) 23-34.
• D. Ray, B. K. Paul, N. Guchhait, Differential binding modes of anti-cancer, anti-HIV drugs belonging to isatin family with a model transport protein: A joint refinement from spectroscopicand molecular modeling approaches, J. Photochem. Photobiol. B, 127 (2013) 18-27.
• B.K. Paul, D. Ray, A. Ganguly, N. Guchhait, Modulation in prototropism of the photosensitizer Harmane by host:guest interactions between β-cyclodextrin and surfactants, J.Colloid. Interface. Sci. 411 (2013) 230-239.
• D. Ray, S. Dalapati, N. Guchhait, Spectral properties of a simple azine Schiff base and its sensing ability towards protic environment through hydrogen bonding interaction, Spectrochim.Acta Part A 115 (2013) 219-226.
• B. K. Paul, D. Ray, N. Guchhait, Unraveling the binding interaction and kinetics of a prospective anti-HIVdrug with a model transport protein: results and challenges, Phys. Chem.Chem. Phys.15 (2013) 1275-1287.
• D. Ray, B. K. Paul, N. Guchhait, Effect of biological confinement on the photophysics and dynamics of a proton transfer phototatomer: an exploration of the excitation and emission wavelength-dependent photophysics of the protein bound drug, Phys. Chem. Chem. Phys. 14 (2012) 12182-12192.
• B. K. Paul, D. Ray, N. Guchhait, Binding Interaction and Rotational-Relaxation Dynamics of a Cancer Cell Photosensitizer with Various Micellar Assemblies, J. Phys. Chem. B, 116 (2012) 9704–9717.
• B. K. Paul, D. Ray, N. Guchhait, Spectral deciphering of the interaction between an intramolecular hydrogen bonded ESIPT drug, 3,5-dichlorosalicylic acid, and a model transport protein, Phys. Chem. Chem. Phys.14 (2012) 8892-8902.

1.Workshop on “New Arena in Photosciences”, 24-27 August,2010 organised by Centre for Advanced Research & Education (CARE), SINP & Indian Photobiology Society.

2.National conference on “New Arena in Photosciences”,28 th August,2010, organised by Department of Chemistry, Jadavpur University& Indian Photobiology Society.

3.International Symposium on ‘Molecular Organisation and Complexity: A Chemical Perspective’, February 6-8,2013 organized by Department of Chemistry, University of Calcutta, Kolkata and also presented poster.

4.UGC sponsored national Seminar on “Nano Science and its Application”, 28 th November, 2015, Department of Chemistry, Fakir Chand College, Diamond Harbour and presented poster.

5. Electronic Structure, Spectroscopy and Dynamics”, Februay 22-25,2018 organised by Indian Association for the Cultivation of Science (IACS), Kolkata and presented oral presentation.

6. National level seminar on “Recent Trends in Chemical Sciences”, October 05-06, 2018, Department of Chemistry, October 05-06, 2018, Surendranath Evening College, Kolkataand presented oral presentation.

• National Post Doctoral Fellowship, SERB, India in 2019.
• Dr. D.S. Kothari Post Doctoral Fellowship, UGC, India in 2016.
• Qualified CSIR-UGC National Eligibility Test (NET) in Chemical Sciences as Junior Research Fellow (Council for Scientific and Industrial Research, Government of India) held on 21^th June 2009 and recipient of research fellowship.

• Qualified GATE in 2010